A capacitor powered mouse from Genius

Why would you want a wireless mouse which has abandoned batteries and instead uses a large capacitor? Apart from the obvious environmental benefit of never tossing out drained batteries, how does a charging time of 3 minutes for an 4 hour charge sound? Bjorn3D also reports that the capacitor will have an expected lifespan of 100,000 charges which ought to last you until we have a new way of interfacing with our PCs. It uses BlueEye technology to ensure that your cursor will properly track across any surface. Bjorn3D was a little disappointed that there was only 2 DPI modes but that will not matter to the mobile office user.

"Have you ever considered the environmental waste from all of the disposable batteries you throw away from your wireless mouse? The DX-ECO from Genius has an ingenious solution to this problem. The DX-ECO uses capacitors as opposed to conventional batteries to store a charge. This makes the mouse extremely light and have a recharging time of only 4 minutes."